Dept. of Sociology and Life Cycle Institute, Catholic University of America : Council for Research in Values and Philosophy, 2005
Buku Teks
De, Serville Paul
Oxford University Press, 1980
Buku Teks
Kaczmarczyk, Lisa C., author
CRC Press, 2012
Buku Teks
Mungiu-Pippidi, Alina, author
Cambridge University Press, 2015
Buku Teks
Dahl, Robert A., 1915-2014, author
Ballantine Books, 1970
Buku Teks